平面度公差属于()。 A.形状公差 B.定向公差 C.定位公差 D.跳动公差

题型:单项选择题

问题:

平面度公差属于()。

A.形状公差

B.定向公差

C.定位公差

D.跳动公差

考点:数控车工考试高级数控车工高级数控车工题库
题型:单项选择题

There was a man who had a little son. He loved him very much. Every day after work the man would come home and play with the little boy.

When the man came home from work one night, he found that he had some extra work to do. And he wasn’t able to play with his little son. He wanted to give the boy something to keep him busy. So, looking around his study, he saw a magazine with a large map of the world on the cover. He got an idea. He patiently tore the map up into pieces. Then he led his son into the dining room and spread the pieces on the table. He explained to the boy that it was a map of the world. He told the boy to put it back together and they could play together when he finished. Surely this could keep the child busy for hours, he thought.

After about thirty minutes, the boy came to the man and said, “Okay, it’s finished, Dad. Can we play now?”

The man was surprised, saying, “That’s amazing! How did you do that?” The boy said, “It was easy. On the back of the page was a picture of a man. When I put the man together, the whole world appeared completely.”

小题1: Why couldn’t the man play with his son that night? 

A.He had to read a magazine.

B.He had some extra work to do.

C.He had to learn something about a map.

D.He had to stay at his office for extra work.小题2:What did the man ask his son to do?

A.To read the magazine to find the map.

B.To tear the map of the world up into pieces.

C.To put the pieces of the map of the world back together.

D.To clean the dining room first, and then read the map of the world.小题3: How long did it take the boy to finish the work?

A.A few hours.

B.About an hour.

C.About half an hour.

D.The whole night.小题4:Which of the following is TRUE about the passage?

A.It’s a report about a father’s extra work.

B.It’s a story between a father and his clever son.

C.It’s an advertisement for the map of the world.

D.It’s a poster about how to deal with parents’ problems.

题型:单项选择题

患者女,既往常感颈肩部酸痛,偶伴左手麻木,近3个月来反复发作左上肢痛,休息后可以缓解。3d前骑自行车不慎倒地,感左臂疼痛加剧,尤感夜间为著,不能入睡。经休息及口服“镇痛药”不能缓解,就诊于急诊。

诊断中需与之鉴别的疾病是().

A.尺神经炎

B.胸廓出口综合征

C.颈背部筋膜炎

D.肌萎缩型侧索硬化症

E.腕管综合征

题型:单项选择题

下列化合物加入二氯氧化锆可生成黄色络合物,但在反应液中加入枸橼酸后显著褪色的是()

A.3-羟基黄酮

B.5-羟基黄酮

C.7-羟基黄酮

D.4′-羟基黄酮

E.3′-羟基黄酮

题型:单项选择题

以下不属于焊料焊接要点的是()

A.焊面清洁好

B.加蜡粘固和砂料包埋

C.只在焊接区局部加热

D.火焰引导焊料流动

E.放准焊料

题型:单项选择题

HCMV输血后综合征的高危人群包括()

A.婴幼儿

B.器官移植患者

C.早产儿

D.孕妇

E.极低出生体重儿

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